really really tangential, but do you know the graph of diamond prices vs size? smooth curve (bigger costs more) BUT with hiccups every x.0 and x.5 boundary is a step with 0.95, 0.96, 0.99 costing the same, then big jump at 1.0, flat at 1.02, 1.03, 1.04 ... then smooth again
because there is magic about being able to say "yes, it's a 1 karat" 0.99 doesn't let you say that tired: the crossroads are magical wired: integer crossings are